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考察了[1—3]中提出的电渣过程传质模型对高合金钢重熔过程的应用,并以该模型分析和处理了实验室交流电渣重熔1 C r 18Ni 9(Ti)钢的试验数据。重熔试验所用结晶器的直径为125mm,相应的电极名义直径为60mm;采用不同的 CaF_2+CaO+Al_2O_3三元渣系,均在大气下进行重熔。重熔过程达稳定状态后,分点加入氧化剂(Fe_2O_3粉)或脱氧剂(Ca—Si 粉或金属 Ca)。结果表明,由该模型估计的熔渣和锭子成分的变化与实际试验重熔过程观测值符合得相当好;利用该模型也可以为高合金钢实际重熔过程中的成分控制指明途径和提供可靠的依据。从理论上说,我们提出的电渣过程传质模型[1—3]可以应用于任何交流电渣重熔体系;当应用于低合金钢的实验室重熔[1,4—7]和工业规模重熔[6—8]时,都取得了很好的结果。就钢种而论,估计和控制活性元素多含量高的高合金钢和合金重熔过程中熔渣及金属两相内的成分变化无疑更有实际意义。为了考察该模型对高合金钢重熔过程的适用性,对在结晶器直径为125mm 的实验室电渣炉上,不锈钢(1 Cr 18Ni 9型)电渣重熔过程中合金元素的氧化作了试验研究。
The application of the mass transfer model of the electroslag process proposed in [1-3] to the remelting process of the high alloyed steel was investigated. The model of the electroslag remelting 1 C r 18 Ni 9 (Ti) Test Data. The diameter of the crystallizer used in the remelting test was 125 mm, and the corresponding electrode nominal diameter was 60 mm. Different CaF 2 + CaO + Al 2 O 3 ternary slag systems were used and remelted in the atmosphere. Remelting process reached a steady state, the point of adding oxidants (Fe 2 O 3 powder) or deoxidizer (Ca-Si powder or metal Ca). The results show that the changes of the slag and spindle components estimated by this model are in good agreement with the actual experimental remelting observation. The model can also be used to indicate the route of component control in the actual remelting of high alloy steel and provide reliable The basis. In theory, the mass transfer model of electroslag process [1-3] proposed by us can be applied to any AC slag remelting system. When applied to laboratory remelting of low-alloy steel [1,4-7] and industrial scale Remelting [6-8], have achieved very good results. In terms of steel grades, it is undoubtedly more practical to estimate and control the composition changes of slag and metal phases during the remelting of high-alloy steel and alloy with high content of active elements. In order to investigate the applicability of this model to the remelting process of high alloy steels, the oxidation of alloying elements during the ESR process of stainless steel (1 Cr 18 Ni 9) was performed on a laboratory electroslag furnace with a crystallizer diameter of 125 mm Experimental Research.